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MCQ

Regular expression x/y denotes which of the following set?

{x,y}

{xy}

{x}

{y}

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MCQ

Regular expression (x/y)(x/y) denotes which of the following set?

{xy,xy}

{xx,xy,yx,yy}

{x,y}

{x,y,xy}

Discussion

MCQ

Here is a context-free grammar G: S ? AB A ? 0A1 | 2 B ? 1B | 3A which of the following strings are in L (G)?

021300211

022111300211

None of the mentioned

Both of the mentioned

Discussion

MCQ

If R is regular language and Q is any language (regular/ non regular), then Pref (Q in R) is _____________

Non-regular

Equal

Infinite

Regular

Discussion

MCQ

You can use RE, if you expect the value of a property to change in an unpredictable way each time its run.

True

False

Discussion

MCQ

Let L = L1 ? L2, where L1 and L2 are languages as defined below:
L1 = {ambmcanbn | m, n >= 0 }

L2 = {aibjck | i, j, k >= 0 }

Then L is

Not recursive

Regular

Context free but not regular

None of the mentioned

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